MLA

Edwards, Jonathan, 1703-1758. II PET. 1:16: "That seeing the glory of Christ is what tends to assure the heart of the truth of the gospel" (p. 3). Box 12, folder 862. n.d.. https://collections.library.yale.edu/catalog/10691974.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 12, folder 862"])(n.d.)[II PET. 1:16: "That seeing the glory of Christ is what tends to assure the heart of the truth of the gospel" (p. 3)]. https://collections.library.yale.edu/catalog/10691974.